Improvement in the manufacture of pasteboard



Win/Mss es ITW www riphery, and resting on rollers HENRY` L. PALMER, on sTILLwATER, NRvv'voRx.

IMPROVEMENT IN THE MANUFACTURE OF ,PASTEBOAR Specification forming part of Letters Patent No. 87.3.59, dated March 2, 1869.

To all whom it may concern:

Be it known that I, HENRY L. PALMER, of Stillwater, Saratoga county, State of New York, have invented a new and useful invention for the purpose of uniting paper to what is known in `trade and mechanical uses as pasteboard, whether Vmade of straw or otherv materials,of which the following is a specili-l cation The usual preliminary work of box-making is lirst to cover one side of the sheets ofpasteboard to beused with paper, usually white, this being-when the box is completed the inside lining of it.

This work is now done by hand. The paper is used in sheets. The drying is accomplished by exposure to the atmosphere, and the work, when done, is liable to Warp, and to be rough and uneven.

I propose to save by this invention this hand manipulation, with an economy inuthe cost of papera-nd labor, and` with the production of the material in a superior condition.

I do hereby declare that the following is a a true and full description of the construction and operation of theinvention, reference bel. ing had to the annexed drawings making part of this specification.

Figure l is a view of the whole machine or combination. Fig.' 2 is an end view of the partrelating more particularly to the operation of pasting and uniting the pasteboard and paper.

Fig. 1, A is a paste-reservoir; B, a concave roller revolving in it, and' giving the paste to C, a conyex roller revolving on its own pe- 'B 'and D is a concave roller, used `for the purpose of bringing the paper against thepasting-roller C, and also for pressing the paper and pasteboard together atthe point of contact between D and L, and also with L to give aconvex surface to the pasteboard to which the paper is applied. L is a convex roller; M, a spring under the bearings of L, to accommodate the pressure of the rollers D and L to `varying thicknessesof pasteboard. F is an endless belt, bywhich the pasteboard is carried to the point of corrtact with the paper, and by which the materials, when united, are carried by. the dotted lines,

in the direction indicated by the arrows around the drying-cylinders and to the calenders. G G are cylindrical rollers, the uses of which are illustrated iu Fig. 2. H is adryingcylin der I' and I', calenders. Kand K' are knives. The dryingcylinder, calender, and knives are intended to represent `such as are usually used in paper-mills for an equivalent purpose.

Fig. 2, C is a pasting-roller; E, the roll of paper leading in the direction ot' the dotted lines; D, a roller 5 L, a pressing-roller and also a guide-roller for the felt; M, a-spring under the bearings of L.

If it be desired to paste the board instead of the paper, it will be done by changing the direction ofthe paper, and, as in the ligure, bring it directly from E to G G', as indicated the pasteboard coming from between rollers D and L, as indicated by the round dotted line, where it has been pasted, meets the paper between G G', after which it will proceed as in Fig. l.

I do not confine myself to the use of concave and convex rollers D, L, C, and B, but can use cylindrical in their place.

Operation: Asthe paper leaves the roll E in Fig. lit proceeds in the direction of the dotted lines between rollers .2,.a11.d0, receiving the paste by coni-ing in contact` with the latter roller. It then passes to the under side of D. The pasteboard is fed in sheets and carried forward bythe belt F. to the under side of the roller D, where it meets the paper. The

two materials are then passed through with the felt between rollers D and L, the springM accommodating for any diierence theremay be in the thickness of the pasteboard or paper. The object of the concave and convex rollers is seen at this point by giving a rounding or convex form to the surface to which the paper is applied, to compensate for any contraction of the wet paper. The material then passes forward'in the direction indicated by the arrows between rollers G G', where it receives additional pressure around the drying-cylinder H, where itis dried, thence through the calenders I I', where it is smoothedand straight ened, thence between the knives K K', which will sever the sheets, or cut to any desired size.

I do not claim as my invention the dryingcylinders H, calenders I I', knives K K', but their use in combination with the other parts, as described.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The method of uniting a continuous sheet of paper to sheets of'pasteboard, as herein described.

2. Giving a convex form to the pasteboard at the line Where the pasteboard and paper meet, by means of convex roller L and concave roller D or their equivalents, for the purpose specified, substantially as described.

3. The combination of trough A, rollers B, C, D, and L, roller E, or its equivalent,for holding the continuous sheet of' paper, rollers Gr G',

and endless apron F or its equivalent, for the purpose specified, substantially as described.

4. The combination of trough A, rollers B, G, D. and L, roller E, spring M, and endless apron F, or its equivalent, for the purpose specified, substantially as described.

5. The combination of trough A, rollers B, C, D, and L, apron F, roller E with n dryingcylinder, substantially as described.

HENRY L. PALMER. Witnesses:

JAMES S. GRINNELL, P. E. WILsoN. 

